Derrick



Feb. 1 1926.

F. HUNT DERRICK Filed Feb. 21, 1925 2 Sheds-Shoat 1 INVENTQR IhyJfiu-zt BY *6? ATTORNEYS 7 INESSES A/ 3.740%

F. HUNT DERRICK Feb. 16 ,1926.

2 Sheets-Sheet 2 Filed Feb. 21, 1925 Patented Feb. 16, 1926.

UNITED STATES 1,573,713 PATENT OFFICE.

FAY HUNT, or NEW YORK, N. Y-

DERRICK.

Application filed February 21, 1925. Serial No. 10,912. 7

To all whom it may concern:

Be it known that I, FAY HUNT, 'a citizen of the United States of America, and a resi.-'

dent of the city of New York, boroughof the Bronx, in the county of Bronx and State of New York, have invented a new and Improved Derrick,'of which the following is adescription. r

My invention relates to a derrick and particularly to a derrick having sills supporting the mast at the convergent ends of the sills and having braces known as stiff legs extending at the outer ends of the sills to the top of the mast.

The general object of my invention is to provide a derrick having increased flexibility and adaptability of adjustment with respect to the relative positions of thesills,

- the connection of the sills with the stiff legs and the connection of the stiff legs withthe I mast.

The nature of my invention and its distinguishing features and advantages will clearly appear as the description proceeds.

Reference is to be had" to the accompanying drawings forming a part of this specification, it being understood'that the drawings are merely illustrative of one example of the invention.

. Figure 1 isa side elevation of a derrick embodyingmy invention;

Figure 2 is a plan view of the sills and the mast supporting base and pintle plate at the convergent ends of the sills;

Figure 3 is a fragmentary plan view showing another adjustment of" the sills relatively to the baseand pintle plate; I

Figure 4 is a fragmentary plan view showing means for connecting" the stiff legs at their upper ends with the mast; Y

r Figure 5 is a-view similar to Figure 1 but I showinga different adjustment of the stiff legs and their connecting means; 7

Figure 6 is a'vertical section through the pintle plate and mast seat; the section being taken on the line ,66, Figure 8;-

Figure 7 is a horizontal section on the line 77 Figure 6; v

Figure 8 is an end elevation of the as-v sembled pi'ntleand mast seat;

Figure 9 is an end view of the stiff leg hitch or connecting means between the lower endof a stifileg and the outer endof a sill- Figure 10 is an end view of the stiff leg hitch shown in Figure 9; i p

Figure 11 is a horizont al 'section on the line 1111,Figure 9;

is a front elevation of the meet a section along line 14- 14 at one end. Thebase 19' is shown as cornposed of two longitudinal members in contact as at 21 beyond the opening 20. On the base '19 is imposed the pintle plate 22 havlng as usual spaced (leperrdin'g flanges 23 accommodated ,in the opening 20 said flanges having holes 24 to receive a trans, verse bolt 25 (Figure 1). The provision of pintles' on the plate 22 is in accordance with my lnventlon. Four of these pintles26 are employed in practice so that they may be used 1n pairs to-[con-ne'ct the i 22 with the sills. The means e ecting con nection between the sills 16 and the pintles *intle p'late 26 is illustrated as in the form of a plate I or strap or casting 27 provided on each sill and having a vertical hole to receive a pintle. The connection is completed through the medium of cotters 28 passed through holes 29' 1n the 'pintles. The plate 221's formed in practice with the usual central boss 3O which receives depending n-ipp'le or thimble 31 .on the ui'i'der side of the mast seat 32, there being a back wall. 33' rising adjacent to said: seat K32; The depending nippleo'i tli i111bl e 3 1 fits over the boss 30 and the opposed seating faces 34am oblique and also keysf35 are fitted in straight trans verse slots 36 in th-im'ble 3 1 and engaging beneatlian undercut shoulder 37 on the boss 30 to prevent vertical displacement of the mast'seat 32. It wil bereadjily understood that the flanges 23 form bearings forthe'pin of the sheaves about which the ropes run after passing downwardlythrouglr the boss 30 in the usual mannerand no further show ing of. this i s'required. I

Comparing Figures 2'a1'1d3, it will be seen that the sills16 in Figure 2 are on two- 0f the pintles 26ia'nd exte and beyond one end: of

the base 19, whereas in Figure 3 the sills are engaged with a different pair of pins 26 and extend beyond the opposite end of the base 19. The provision for thus variously disposing the sills 16 relatively to the pintle plate 22 permits of the sills being variously positioned to suit the particular ground or available space where the derrick is to be erected, and at the same time to insure a stability as well as flexibility in the structure.

Referring to the stiff leg hitch or means connecting the lower end of a stiff leg 17 with the adjacent sill 16, as shown in Fig ures 1 and 2 and Figures 9 to 11, a pillow block 38 is provided, forming a seat fora rockable bearing 39 rounded at its center and having trunnions 40 receiving a transverse bolt 140 engaging straps 41 on the lower end of each stiff leg 17. The stiff leg hitch is completed by a cap 42 disposed over the bearing 39 and the pillow block 88. The arrangement permits of the rockable bearing 39 and its trunnions 40 with bolt 41 having a universal movement when the stiff legs 17 are shifted from the position shown in Fig-= ure 4 to the position shownin Figure 5 and makes unnecessary any shifting of the sills 16 because of the changed position of the stiff legs.

In order that the stiff legs at their upper ends may accommodate themselves to any relative positions of the sills 16, the following means are provided: A cap 43 of each leg receives a vertical bolt 44 which passes also through an arm or gooseneck 45 to effect pivotal connection between said arm and the stifi leg. The gooseneck 45 pertaining to the'respeetive stiff legs 17 are both turnably engaged with a gudgeon pin 46 provided at the top of the mast 15. Said gudgeon pin 46 is disposed alongside a cap 47 on the mast 15. The gudgeon pin 46 has a transverse notch 48 near the lower end which receives a rib or bead 48 on the cap 47, said rib being disposed between two vertical ribs 49 on said cap 47. The gudgeon 46 is clamped in position placed between the ribs 49 by U-bolts 50, the half round fitting 51 which receives the transverse pin 52 of the usual shackle for securing to the mast the topping lift tackle chain 53. The goosenecks 45 are secured to the caps or fittings 43 on the respective stiff legs 17 by means of bolts 44, passing through the goosenecks 45 and vertically through said caps 43. Said goosenecks 45 are free to turn both about the bolts 44 and about the gudgeon pin 46 on the mast so that the stiff legs 17 may take the position shown in Figure 4 or that shown in Figure 5. To secure the goosenecks 45 against) turning for maintaining the stiff legs 17 in fixed position, bolts 53 are employed adapted to pass through a bolt hole in the goosenecks 45 and through bolt holes 54 in the caps 43. To limit the lateral swinging movement of the goosenecks 45 about the bolts 44, step lugs 55 are pro vided on the caps 43 and each presents an oblique face toward the goosenecks 45 to arrest said goosenecks at the proper angle.

With the described connection between the stiff legs 17 and the mast stop, I provide for a materially increased amplitude of swinging movement for the boom 18 since with the stiff legs in the position shown in Figure 5, the boom may swing close against either goeseneck. This is so because the position of the gudgeon pin 46 which instead of passing through the stiff legs directly at their juncture, is ofiset and remote from the convergent ends of the stiff legs.

I would state furthermore that while the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim: 7

1. In a derrick, sills at an angle to each other, means to support a mast adjacent the convergent ends of the sills, and pintles adjacent the convergent ends of the sills and disposed in pairs to permit of engaging the sills with various ones of the pintles for disposing the sills in various positions about the mast supporting means.

2. In a derrick, a pair of sills disposed at an angle to each other, a base adjacent the convergent ends of the sills, a pintle plate supported on said base and held thereto and presenting pins in various positions about the center of the plate, said sills adapted to engage the different pins to variously dispose the sills about the pintle plate.

3. In a derrick, a pair of sills disposed at an angle to each other, a base adjacent the convergent ends of the sills, a pintle plate supported on said base and held thereto and presenting pins in various positions, said sills adapted to engage the difierent pins to variously.- dispose the sills about the pintle plate; together with. a mast seat supported on said pintle plate.

4. In a derrick, stiff legs, sills, pillow blocks on the sills near their outer ends, and rockable members resting on said pillow blocks and secured to the stiff legs.

5. In a derrick, a mast, a cap on said mast, a rib on a face of said cap, a gudgeon pin having a notch adapted to receive said rib, stiff legs, and goosenecks pivotally connected with the gudgeon pin and the stifi legs.

6. In a derrick, a mast, stiff legs, fittings on said stiff legs at the top, goosenecks pivotally connected with said fittings, stops on the fittings limiting the lateral movement of the goosenecks relatively to the stiff legs,

and means to pivotally connect the goosenecks with the mast top.

7. In a derrick, a mast, stiff legs, fittings on said stiff legs at the top, goosenecks, means pivotally securing the goosenecks to 10 mast top.

8. In a derrick, a mast, a cap on said mast, a rib on a face of said cap, a vertical gudgeon pin having a notch into whichsaid rib enters, a fitting coacting with said face of said cap and With said rib to clamp said 15 gudgeon pin in position, said fitting adapted to receive the connection With the usual topping lift tackle.

FAY HUNT, 

